破碎发射药等效形状函数的确定方法

为了准确表征破碎发射药在火炮膛内的燃气生成规律，提出了确定破碎发射药的等效形状函数的方法。通过密闭爆发器试验模拟不同破碎程度发射药在真实的膛内环境下膛压与时间的变化关系，得到破碎发射药等效形状函数，并定性分析了其与起始动态活度比的关系。该方法所得的等效形状函数能体现破碎发射药的燃烧特性，为考虑破碎的两相流内弹道研究提供了一种新方法。

Determination Method for Equivalent Shape Functions of Fractured Propellants

In order to accurately describe gas generation rule of the fractured propellant,a new method of determining the equivalent shape functions was presented. The propellant grains with different fracture degree were tested in closed bomb for the correspondence relationship between chamber pressure and time. The equivalent shape functions were derived. The relation between the equivalent shape functions and the initial dynamic vivacity ratios was analyzed. The result shows that the equivalent shape functions based on the method can characterize the fractured propellant. The study provides a new method for the dynamics of the two-phase flow in interior ballistic.